Transmission mechanism



2 sheetysheet 1 Jan. 1l, 1949. c. D. PETFRSONl E-rAL.

' TRANSMISSION MECHANISM Original Fi;ed Aug. 7, 1943 QN t Jan 11, 1949- t c. D. PETERSON TAL -2,459,094

TRANSMISSION MECHANISM original FiledAug., 7, 1943 `v 2 sheets-sheet g VEN TOR.

Patented Jan. 11, i949 can n'. reta-sen and-Albert-m neim'el; .'rnleau: Ohio, assignors togDana Gorporfti'ongl Tledoi l hio, a corporation of Virginia Original application :August JT," liiiflf,A 4972839. Divided and this 'applic:itorrNovem-y This invention relates to transmissionA mechanism of the type described in our pendingapplica-l tion, Serial Number 497,839, filedy August 7, .1943 (Patent Number 2,397,883, issuedAp-ril 2, .1946), of which this application is a division.

The invention has for its object `a low speed or reduction gearing in a transmission mechanism which embodies inner and outer concentric drive shafts, a driven shaft alined therewith, and clutches operable to alternately connect the drive shafts to the driven shafts'which low speed: reduction gearing is actuated by the slower running drive shaft and transmits its motion to the driven shaft through an over-running clutch which permits the driven shaft to be actuated at the yhigher speeds when the driven shaft is clutch-edto either of the drive shafts. The outer drive shaftV is usually actuated by the engine through a torque converter or something having a slip action and controlled by an engine clutch, and theinner 'drive shaft being in direct drive with the engine, vand hence run at higher speed than the outer `drive shaft. ,Y I

The invention consists in the novel featuresjanfd in the combinations and constructions hereinafter? set forth claimed. f In describing this invention, reference is" had to the accompanying drawings, in 'which like characters designate corresponding parts in fall the views. v

Figure 1 is a longitudinal fragmentary sectional view of the transmission mechanismshowing the indirect, 10W or first speed drive for the driven shaft.

Figure 2 is an enlarged longitudinal'sectional View through the clutch mechanism and con# tiguous parts for alternately connecting the two drive shafts and the driven shaft.

I and Z designate outer and inner concentric drive shafts, the outer drive shaft being usually the output shaft of a hydraulic torque converter,

the impeller of which is actuated` by an vverig-irrel and the inner shaft being .actuated 'directly from the engine, all as in our pending application rea ferred to. M

3 designates the driven shaft axially alined'with the concentric shafts I, 2 and spaced axially therefrom, it having a cylindrical head 4 enclosing a space between the drive shafts and the driven shaft. The concentric shafts are journalled in suitable bearings 5, 6 in walls l', 8 of a gear casing. As the drives from the outer shaft I are intermediate drlves, the driven shaft 3 or the head 4 thereof is driven through an overrunning clutch designated generally 9, which permits the shaft aclantis. (ol. 74,;slss)4.17 d' l z .tu veran theshaft rotatable-with the outer shaft, an outer :race yII: and rollers I2 between them". The intermediate' chronizin'g clutch `desigrlated generally bythe rf?- erenceA numeral I3,.theid`riven s'ectidnxIA of 'which is rotatable with the outer race `I `Il and the driveny section of which isrotatab'le with the head Las Lwill' be `hereinafter explained.y 'The direct? 'drive' from the drive shaftzls eiectedthrugh a cll'ltch,`

as a balking clutch designated generally I41,`havii1g" a shiftabl'esection I'5. -In sofar as this invntin is concerned, clutches l3` and fI`4"mayb lof any suitable construction.

"'Bfdesignats the* shiftable section of itheysyn-l chronizing `clutch I 3, this being splined on the 'pew' ripher'y of the head '4 and formed with a shifting collar I-1.f`This collaris connected to a; shiftable section `I5 of the balkin'g ring clutch through si4 spider I8' interlocked in a groove 'in a hub 4of s'e'cff tion'l and having radial arms extendigfthrough slots I9 in the head 4 *and `suitably interlpck'd'l with the 'shifting collar '|1.- shifting-of tri cljutii collar ITto 'the right engages the 'synchroniln clutch I3, and'in theoposite rdirectior'i"shifts section ISfof thebalkig ring clutch 'into eng ment. During movement of theJ shifting collar-' to the right,Ltlleshlftbletalking rlngicliitch seetion I5l merely slides idly. For a yfull ldescriptit)'rl of these cltchessee our application Serialv Nulnf.' ber 504,231, filed September I29, 1943,"rlov`v Patentv No. l 2,399,568, dratelvnprll `3,0, 1 946g and Patent Number`2,'363,746 issued November 28, 11944,' ,and

also application-'serial Number j5`0;4,j232n1ed sen-f tember '29,1943 `y(ra-ent Numser 2,394,099,` vvissim* Fbrilarys, 11946). i y

Briefly, 'the synchronizing clutch "issliowny 'asof cor'enfiiction tybe, the id r'inei'vcone of 'whicl'fi` initially slides as. a unit withV the shifting lella-1* I 6 vand then ,releases therefrom, and bermits y'the collar I6 to continue its Y'shiftingAtobririgfth clutch teeth on `the collar I6 intoengagernent with the fcluteli'teetn `ori tn-e 'curar'1 `race ll .f 'rh shine ingccvrlla'lrhlt transfers its sh'iftingin movev yent to the internal cone-'member of 'the'frictionclutch" through spring pressed poppers `which yield "t free the collar IB from the cone member when the shifting in movement of the cone member is limited by its engagement with the outer complemental cone member of the synchronizing clutch, all as specifically described in the patents referred The present invention lies in the indirect, first or low drive gearing between the outer drive shaft The overrunning includes an inner racel or cam I0 mounted- Ierlandy I and the driven shafts 3 primarily to produce low speed forward, and comprises a countershaft 2| suitably journalled in the casing parallel to the axes of the drive shafts l, 2 and the driven shaft 3, and extending across the head 4 and the clutchesrtherein, Iagear 22,v mounted on one end of the shaft 2l andmeshingwith a gear 23 on the outer drive shaft 2, a gear 24 on the other end of the countershaft 2I and meshing with the gear 25 concentric with the driven shaft 3, a clutch gear 26 splined on the driven shaft 3 in the rear of and adjacent the hea'd 4 andhaving an elongated hub 21 on which the hub 28 of the n gear 25 is rotatably mounted, and clutch means between the gear 25 and the clutchgear 26 here. shown as including an overrunning clutch be-` the peripheral teeth of the clutch gear 26. This clutch collar 30 is shiftable so as to yinterlock exclusively and engage with the 'clutch gear 2B, anditis shifted :in any suitable manner. The clutch gear 30 is provided with external gear teeth which mesh with a reverse spool, not shown, when the clutchcollar 30 is-shifted into exclusive engagement with the clutch gear 26.

Owing to the-overrunning clutch including the rollers 3|, the driven shaft 3 can overrun the indirect or low drive when the shaft 2 is being driven to a higher gear ratio from the shafts I or 2. Thus, inail forward speeds, the clutch collar 30 is in the position shown in Figure 1.

-In-operation, with the clutch collar Il in neutrai position, the drive willi be from the outer drive shaft I which is driven from the engine shaft through the hydraulic converter, `through gears 23, 22, 24, 2B, the overrunning clutch includlng rollers -3I, to the collar 3D, and thence to the driven shaft 2. Upon the shifting of the lclutch collaryl'l to the right, the drive is through4 the synchronizingclutch I3. Shifting of the clutch collarA Il to` the left from neutral, shifts in the balking clutch section I fthus connecting the shaft 2. directly to the shaft 3. The clutches are 'i controlled in any suitable manner, ent application referred to.

What we claim is: f 1. In a transmission mechanism, inner and outer concentric drive shafts, a driven shaft axially'alined therewith, clutch means operable to connect either of the drive shaftsto the driven shaft, and indirect drive meansv between the outer drive shaft and the driven shaft-including an overrunning clutch permitting the driven shaft to overrun the indirect drive when the inner drive shaft is connected to the driven shaft to drive the same.

2. Ina transmission .mechanism inner and cuter concentric drive shafts, a driven shaft axially alined therewith, a clutch operable in one direction from neutral to connect the outer drive as in the parshaft to the driven shaft and in the other direc- ;tion from neutral to clutch the inner drive shaft to the driven shaft, and an indirect reduction drive gearing between the outer drive shaft and the driven shaft including an overrunning clutch tov permit the driven shaft to overrun the indirect drive when the inner shaft is clutched to the driven shaft.

3. In a transmission mechanism, inner and outer concentric drive shafts, a driven shaft axially alined therewith, a clutch operable in one Adirection from neutral to connect the outer driving shaft to the driven shaft and in the other direction from neutral to clutch the inner drive shaft directly to the driven shaft, clutch sections `.on the outer drive shaft and the driven shaft I .for coactingwith said shiftable clutch, an over- -Number running clutch between the outer drive shaft and saiddrive clutch section, indirect reduction drive gearing between the outer drivel shaft and the driven shaft including an overrunning clutch permitting the driven shaft to overrun the indirect drive when the driven shaft is clutched to the inner drive shaft, the first overrunning clutch permitting the driven shaft to overrun the outer drive shaft when driven at a higher speed by the inner drive shaft.

' 4. In a transmission mechanism, inner and outer concentric drive shafts, a driven shaft axially alined therewith and spaced therefrom and having a hollow cylindrical head, the inner drive shaft extending into the head beyond the end of the outer drive shaft, a clutch operable to connect the inner drive shaft to said head including a shiftable section mounted on the drive shaft Within the head, a clutch operable to connect the head to the outer drive shaft including a drive section actuated by the outer drive shaft, a shiftable section on said head and having a shift collar shiftable in opposite directions from neutral, the shiftable clutch section within the head be ing connected to the shift collar to shift therewith, the shiftable sections in and on the head being shiftable alternately into their engaged positions in opposite directions from neutral, an overrunnng clutch between the outer drive shaft and the drive section of the clutch actuated thereby by the outer drive shaft, for permitting the inner drive shaft to overrun the outer drive shaft, indirect reduction gearing between the outerV drive shaft and the driven shaft including an overrunning clutch, permitting the driven shaft to overrun the indirect drive shaft, the latter overrunning clutch being located concentric with the driven shaft adjacent the head on the driven shaft.

CARL D. PETERSON.

ALBERT H. DEIMEL.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Name Date 2,355,709 Dodge Aug. 15, 1944 

